如图，直线a∥b，直线c与直线a、b都相交，从所标识的∠1、∠2、∠3

如图，直线a∥b，直线c与直线a、b都相交，从所标识的∠1、∠2、∠3、∠4、∠5这五个角中任意选取两个角，则所选取的两个角互为补角的概率是(　　)

A. B. C. D.

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如图，直线a∥b，直线c与直线a、b都相交，从所标识的∠1、∠2、∠3

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